Plow-point



(No Model.)

y W. F. BALDWIN.

APLOW POINT. No. 271,593. Patented Fe'b. 6., 1883.

y l any.

N4 PETERS, Pneto-umeg-mprmn wnhingwn. 0.1:.

Ummm STATES PATENT Geelen.

W'ILLIAM F. BALDWI, OF GRAYVILLE, ILLINOIS.

PLOW-POINT.

SPECIFICATION forming part.of Letters Patent No. 271,593, dated February 6, 1883. 'Y

Application filed October 5. 1882. No model.)

' thereon, which form a part of this speciiicatiou.

Figure I is a perspective view of my iinproved plow point and share fitted together,

e a portion of the main body of the plow being ,also shown. Fig. 2 is a bottom plan of the same. Fig. 3 is an elevation of my improved point detached from the share side, the shape ot' the slot being shown in dotted lines. Fig. 4 is a cross-section ot' the share and point on liuc :v fc, Fig. 2.

A is the plow-point, cast or forged, of any preferred metal, in the form shown. Itis constructed of a vertical wall,A', having substantially the form of a rightangled triangle, and atop part or web,A2, connected with the former along the hypotenuse of the triangle, and forming therewith a solid-pointed extremity, of which a c' are the cutting-edges. The-part A2 also slopes downward toward the shareplate, overlapping it. In the vertical wall A' is formed a slot, B, which is contiguous to and runs along the lower surface ot' the top part, A2. A web, B', preferably of the triangular shape shown, is cast to the vertical wall along the lower edge of the slot B, near its for-ward cud, and at the end of the slot it unites with the top part, A2, closing the forward end of the slot and forming the socket B2. The line of its union with the top part and the front wall of the slot, which coincides with this line, slopes backward from b to b', thus forming, with the wall A, a dovetailed angle, for a purpose to be described.

bz is a bolt-liole in the wall A.

C is the share-plate, havinga cutting-edge, c', edge c', which lits closely in the slot B, t'orward edge, c2, which abiits against the front wall of the socketB?, and rear edges, c3 c, the latter one of which abuts against the front ing the mold-board, and E the land side portion. The part E projects forward from under the mold-board, forming the point E', and has on its land side the vertical rabbet e. To tit my device to such a plow, I secure the shareplate C to the plow-body by bolting through the hole e5 to the part E, the hole c5 being countersunk and the nut placed upon the under side of )art E' in the usual manner said undersidebeing higher than'thecutting-edges.) The share-plate is also connected with the plow-body by a strap, d, upon the under side, which is bolted to' the plow-body and to the share-plate at c6. The point A is secured by titting it over the share-plate, the angleformed by edges c' cz ot' the latter entering the socket B', and the edge c2 litting in the slot B, and by holting the wall A' to theside of the part E' at bz. It will be readily understood that this bolt b2, together with the hold which the socket B2 vhas upon the edge c2 of the share-plate, effectually secures said point in place. It will also be secu that the point A may be secured in place tirst and the share-plate C afterward, and that either may be removed at pleasure without disturbingthe other. Either of these parts may, moreover, be formed integral with or permanently secured to the plow-body and the other part detachably secured in the manner described.

The great strength of my mode of conuccting the share-plate and point, which modeconsists in the peculiar shape and position of the slot B and socket B2, and in the corresponding shape of the share-plate, whereby the full strength of the top web, A2, and side wall, A', are utilized, cannot fail to be perceived. The great difficulty encountered with most of. the detachable points in use is their liability to breakage, arising from themanner in which they have been heretofore shaped and attached. This liability is obviated or much lessened by my construction. The general simplicity of my mode ot' constructing and fitting the parts and the convenience with which they may be detached and replaced are also evident.

I am aware that the plow-point and shareplate have heretofore been made in two parts, separately detachable, and that such shareplate and points have been connected together by openings in the side of the point, and, more over, that such openings have been made dovetailed in shape or adapted at their front ends to retain the share-plate, and l do not claim such construction as myinvention. Thelightness and strength of my device is attained hy constructing it virtuallyof a side wall and top flange. This top flange is thickened at its forward end to make a solid point. this flange were relied upon for the attachment of the share'plate by bolts or otl1erwise,'the weakness of the structure would be evident. I have entirely obriated this difficulty, however, and retained the necessary strength with this lightness of structure by makinga slot of the thickness ot' the share-plate in the side Wallcontiguons to the top flange for the reception of said plate, and the forward corner of the plate is seated in the thicker portion of the top flange, which forms the point. It will be seen by attention to the external shape of my point that the pattern can be drawn from the sand, and the casting done Without using a core or chill, notwithstanding the fact that the retaining'socket Bghasto he formed. The pattern must be drawn on theline ot' the front wall of said socket which runs diagonally backward from the land side and toward the furrow side, and this could not ordinarily he If', however,

done, because ofthe greater depth of the rear end of the point compared with the forward end; but I have shaped the upper surface of the top flange, sloping itdownward towardthe furrow side, as shown in Fig. 4, so that on all lilies drawn parallel to the front ofthe retailiing-socket the point shall taper and the pattern of my point may be drawn without difliculty, thus cheapening the cost of manufacture.

l. A detach ableploW-point, consisting of the side wall, A', and top flange, A2, and having the retaining-socket B2 in the point and the slot B in the side wall contiguous to the top flange, in combination with the share-plate, the edges of which are adapted to fit into said point, substantiallyI as set forth.

2. Adetachable plow-point, consistingof the side wall. A, and top tlange, A2, and having the slot B in the side wall and the retaining socket B2 in the forward part, the front line ot' which socket inclines diagonally backward from the land to the furrow side, said point tapering on all lines parallel to the front line ot' said socket, thus insuring the withdrawal ot' the pattern, substantially as set forth.

[n testimony whereof I atlix my signature in presence ot" two witnesses.

ULI/[AM F. BALDWIN.

Witnesses:

J. S. BARKER, H. H. BLISS. 

